It’s generally better to keep stored potatoes dry and wash them shortly before preparing them.
The Bottom Line
So, Grandma wasn’t necessarily doing anything wrong.
In fact, storing whole raw potatoes outside the refrigerator can be perfectly reasonable when they’re kept in the right conditions.
The important thing isn’t whether exactly seven days have passed.
It’s how the potatoes have been stored and what condition they’re in now.
Keep them cool, dark, dry, and ventilated. Protect them from sunlight and heat. Check them periodically for soft spots, mold, rot, extensive
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